Spring-seat post.



W. s. HARLEY.

SPRING SEAT POST.

APPLICATION FILED APR: 30, 1910.

Patented Dec. 27, 1910.

WILLIAM S. HARLEY, OE MILWAUKEE, WISCON SIN Prtlillillilll tih lillfiiilSPRING-SEAT PUST.

Application filed April 30, 1910. Serial No. 558,598

' -T all whom it may concern:

. Spring-Seat Posts; and I do hereby declare angle to-Fig. 1.

that, the following is a fIIlL'ClGZIE, andexact description thereof.

hly inventitin has for its object to provide a resilient seat supportfor motorcycles, b1- cycles or like vehicles, the construction andarrangement being such that the required amount ,ofresiliency isobtained, while"at the same time rigidity in a lateral direction insuredand-back lash due to compression compensated for. r I

li ith these objects in View the invention consists in certainpeculiarities of construction and combination ofparts as set forthhereinafter with reference to the accompanying drawings and subsequentlyclaimed.

In the drawings Figure 1 represents an elevation partly in section of aportion of a motorcycle frame provided with a seat support embodying thefeatures of my invention; Fig. 2, a detail plan viewof the hingeconnection between the saddle supporting bar and vehicle frame; and Fig.3, a partially sectional detail View of the shackle connection, thesection'being taken at a right Referring by characters to the drawings;1 represents the top bar of a motorcycle frame,.which bar issupplemented by a second bar 2 arranged parallel thereto, these barsbeing in brazed connection with a Seat-mast 3. At a predetermineddistance from the seat-mastthe top bar is bent and converges toward thelower bar forming an oblique section 4:, whereby the mouth of theseat-mast is lowered to a. point below the axis of the upper bar inorder that the seat,

when placed in position, can be dropped to a convenient point.

The mouth of the mast has brazed therein a gland 5, into which gland isfitted a tubular well that is preferably composed of two sections,theupper section-6 being provided with a flanged end 7 'that rests uponthe outer end of the gland, said flange being clamped to the gland bymeans of a flanged coupling member that is in screw-threaded connectionwith-a threaded shank/of the specification of Letters .Qatent.

gland. The lower end of the upper wel1 iatented Dec. 33?, 159.1%. i l

section (3 has brazed or otherwise secured thereto a collar 8, having ascrewthremled extension for the ree ption of the corresp indiii e 'lvserew-threaded end of the lower tube section 9 of said well. Thissection of the well is closed at its bottom to form a reservoir 10,which. as shown. may. in some instances be partly filled. with oil ifdesired.

A rceiprocatirc sleeve post 11 is titled into the upper section of thewell as shown, being provided with a head 12, that is brazed orotherwise secured thereto. the head being provided with ears for thereception of a pin 13, upon which pin is loosely mounted a bearing-block1 3. The head has secured thereto a plunger-rod 1-1, which extends areclosed by the disk when the plunger-rod rises.

Interposed between the upper face of the collar 8 and lower face of thehead 12 is a coiled spring 18, which coiled spring surrounds the plungerand is adapted to support the load. A second coiled spring 19 isinterposed between the lower face of the collar 8 andan adjustable nutand washer 20, the nut being in screw-threaded engagementwiththeplunger-rod 14, whereby tension of the coiled spring 19 isadjusted simultaneously with adj ustmentof the upper spring 18.

The lower coiled spring 19 is provided for the purpose of cushioning theup-stroke'of the seat-post incidental to sudden depression thereofthrough shock, whereby shock to the rider is eliminated in eitherdirection, it being understood that the adjustingnut 20 may be set inproportion to the weight of the rider, whereby the proper amount ofresiliency is maintained.

Brazed or otherwise suitably secured to the top-bar 1 at the-junction ofthe oblique portion 4 and horizontal portion 1 is a bracket 21:, whichbracket has extending therefrom an apertured car 22, for the receptionof the crotched end 23 of a saddlebar'Q, the 'crotched end of the saddle-bar being provided: with' apertures through which a hinged pin 25passes, the said hinged the ports and restricted vents.

.up-stroke or recoil of the post the piston pin being also passedthrough the aperture in the bracket ear.

' Adjacent to the rear end of the saddle-bar there 1s secured a brackethaving a depend ing slotted car 245, into the slot of which car thehearing-block 1 3 is fitted. whereby the rear end of the sz'u'ldle-haris supported. By this shackle connect-ion the seat-post and bar areconnected and held rigid in a lateraldirection while at the same timesaid connection will permit 'l'rec downward movement oi the seatpostwithin the mast due to play of the hlock l within the slot ol the car26, and, shown in the drawing. the seat-post is in its highestpr.-.-.aition. being locked by the back of the block 13 engaging thefarther end of the slot within the ear. The seat, not shown. is desi ncdto he supported upon the bar in any suitable position and can beadjusted thereon longitiulinally to suit the head however. will retardthe movement. This is accomplished through the valve-disk 16, whichcloses the ports in the piston head and a partial vacuum between thepiston head and bottom 10 of the reservoir is ol tained. which vacuiiuiis slowly relieved through the restricted vcntsil? and thus the deviceserves as a shock-absorber in conjunction with the coiled spring 19,which spring g i l I l l l l l l l l is compressed upon tie up-stroke-ofthe I seat-post.

'v utilizing the hinged bar 2%, through which the load is applied totheseat-post, it is obvious that said seat-post can be reciprocatcdfreely without binding and this bind ing' result would attain to thedetriment of the movement were the load applied vertically and directlyupon said post which, as shown, is obliquely inclined.

I claim:

1. in a, vehicle frame having a horizontally disposed bar. an obliquescat-mast in union with the frame-bar, a spring-conlrolled sleeve-post;in telescopic connection with the seat-mast. and a seat-bar pivotallysecured to sa *1 iramc-har; the combination of head extending from thesleeve-post, a

pin carried by. the head, a hearing-block loosely inounted upon the pinand a bracket secured to these slotted ear, \Vlilllil which slot thehearingblock is fitted and adapted to have play.

2. In a vehicle frame-having a horizon: tally disposed her an obliqueseat-mast in union with the iranie-bar, a spring-cons; trolledsleeve-post in telescopic connection with the scat-mast, and seat-barpivotally secured to sai tramehar; die combination ofa head secured tothe sleeve-post, ears ex; tending from the head, a pin carried by thecars, a hearing-block loosely mounted upon the pin between the 'ears,and abracket secured to the seat-bar having a depending slotted ear.within which. slot the bearing,- block is fitted and adapted to haveplay.-

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukee in. the bounty of Milwaukee and State ofWis' cousin in thepresence of two witnesses.

lVILLIhIi I S. HARLEY. Vil'nesses:

' MAY Downer,

Geo. W. YOUNG.

eloar havin a depending

